The issue is that you did not add your database user to your adoptables site database. For this reason the user is not authorized to access database. Also apparently, you didnt run the script installer at all as there was no data in the database anyway. I've reinstalled your site and it should be working. If you want to learn how to install it manually incase you need it in future, read this thread and it will help:
http://mysidiaadoptables.com/forum/s...ead.php?t=3532